These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Heroic Legend of Arslan
Fanon Discontinuity: The last two episodes are often regarded a being this, for having significantly lower production values than the previous four.
Ho Yay: Darun and Arslan have quite a few moments, especially in the early OVAs, and their relationship could be easily interpreted as a sort of Bodyguard Crush. There's also Darun and Narsus who used to be best friends before Narsus was expelled from the court, and now play Vitriolic Best Buds to each other.
It doesn't help (or does, depending on your point of view...) that many of anime character designer Kamimura Sachiko's fantasy characters look exactly the same as her Arslan characters, down to their costumes... and she's done a number of BL novel illustrations. At one point she actually had to clarify at her website that the couple in a picture are, despite all appearances, not Darun and Arslan. (She wasn't very convincing.)